diff --git a/plugin/indent_guides.vim b/plugin/indent_guides.vim
index 907ee6d..21c219f 100644
--- a/plugin/indent_guides.vim
+++ b/plugin/indent_guides.vim
@@ -30,7 +30,7 @@ command! -bar IndentGuidesDisable call s:IndentGuidesDisable()
 "
 function s:InitVariable(var, value)
   if !exists(a:var)
-    if type(a:var) == type("")
+    if type(a:value) == type("")
       exec 'let ' . a:var . ' = ' . "'" . a:value . "'"
     else
       exec 'let ' . a:var . ' = ' .  a:value